Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM

	APS-C大小的影像可產生APS-C大小影像的鏡頭只屬數碼屬性，它們不可使用於比APS-C 格式更大的影像接收器，也不適用於菲林相機。超聲波自動對焦一般來說，超聲波對焦鏡頭比傳統對焦鏡頭靜和快。不穩定影像穩定器能減低手震時產生的模糊影像，特別在長焦距或陰暗情況下。根據倒數的定律，影像穩定化比無影像穩定鏡頭能有1到3個光圈優點。金屬接腳平價鏡頭通常會使用塑膠接腳，而較昂貴的專業的鏡頭會使用金屬接腳。一般來說，金屬接腳會比較耐用的及當鏡頭改變很多。當相機主要使用一個鏡頭，接腳物料並不是很重要。內置對焦內置對焦鏡頭不會因設定焦點而改變其大小。固定前鏡頭固定前鏡頭在變焦及/或對焦時不會轉動，故可容許攝影師用花瓣狀遮光罩，固定前鏡頭能更容易利用極化濾鏡。天氣密封天氣密封鏡頭可防止塵埃及水份浸入。當鏡頭不是防水的，此類鏡頭可適用於下雨及朝湿環境。有些密封只可防水或防塵。天氣密封只適用於類似天氣密封相機內。無插入濾鏡支援插入濾鏡使用於那些前鏡頭過大或視野不容許於鏡頭前傳統濾鏡的鏡頭。通常遠攝及超廣角鏡頭支援這類濾鏡。

資料紙
評語
用者評語
配件
圖例

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 技術規格

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 技術規格
可用的接環	Pentax K
應用	人像, 風景, 室內, 建築物
類目	廣角變焦
倍增器	1.5×
穩定器	否
焦距	16 - 50 mm (3.1× 變焦)
鏡片組	12 群組含有15 元素
視角	35毫米: 不適用數碼: 不適用
葉片數目	9
最大光圈	廣角: f/2.8 遠攝: f/2.8
最小光圈	廣角: f/22 遠攝: 不適用
最短焦距	30 cm
放大	0.21×
濾鏡大小	77 mm
大小	∅ 84 × 98.5 mm
重量	565 g
記錄
自動對焦速度	不適用
自動對焦聲音
內置對焦	是
內置變焦	不適用
固定前鏡頭	是
接駁類型	鐵
天氣密封	是
插入濾鏡	否
超聲波自動對焦	是
APS-C大小的圈	是
低散光度鏡頭元素	不適用
硬機殼	不適用
軟機殼	不適用
遮光罩	不適用
三腳架接合器	不適用

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 評語

Other reviews

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 評語在dc.watch.impress.co.jp (日文)
Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 評語在www.photozone.de (英文)

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 用者評語

亞瑪遜內最有用的用家評語

Tremendous lens, a bargin compared to...

25 November 2007

If you've read my previous reviews, you know that I'm a retail camera salesperson. I get to use a wide variety of equipment, but I'm a bit picky on what I buy myself. I own this lens.

I couldn't be more pleased with this lens for my K10D. The images are crisp at all focal lengths and apertures. The focusing is both fast and smooth. (Note: it will require updating to firmware version 1.3 for the K10D to autofocus properly.) Build quality is top-notch, and the weather-proofing is nice, although I doubt I'll test that often.

Pentax has also equiped this lens with the older drive system, so that it can be used on older digital cameras, but the noise level goes up, and the AF performance, while decent, goes down.

This is an amazingly good deal compared to either the Canon or Nikon lenses in the same range. The Nikon has about the same build quality, but costs considerably more. The Canon has the IS system built into the lens (not necessary with Pentax); therefore, it costs about the same as the Nikon. A very good lens, it still doesn't have the build quality "feel" of the Pentax nor Nikon. Additionally, the 16mm makes the Pentax a bit wider, a big advantage for my type of shooting.

Simply put, without this lens, I'd be shooting Nikon.

sharp and smooth

4 January 2008

The built quality is exceptional. sharp, smooth and fast AF. Be sure to update your k10D firmware to v 1.3 before using this lens, so you wont be like me at first scratching my head wondering why a lens this expensive is noisy and vibrates. The lens is made in vietnam-nothing wrong with that, for some reason I was under the impression it was made in Japan.

Bad QC

21 March 2008

I'm very disappointed with this lens. The subject of every picture I took on my K10D with this lens was out of focus when shot on auto. The focal point seemed to be 3m behind my subject. None of my other lens have this problem. My DA* 50~135 consistently hits focus on the target and is ridiculously crisp. I could manually focus on my subject and produce a reasonable image if the aperture was dialed down enough, but the point of this lens is the ultrasonic auto focus. At 50mm f2.8 everything was very soft. The image didn't start to sharpen up until f5.6. When shooting at 16mm nothing was sharp. The entire aperture range was blurry. At any range there was a 5mm purple fringe on any high contrast object. I have heard some people have gotten great copies of this lens. This wasn't one of them. For every great review of this lens I see, there are about 8 people complaining about it. Pentax, this is unacceptable. Think of your reputation!

Great or not Great

17 March 2008

If you search the Pentax forums you will see that this lens has a return rate estimated to be 5%-10% to 50% to more. The issue is quality control. One major difficulty is front and rear focusing issues. Pop photography says the simga 18-50 is better optically and costs half as much. However, this lens seals your K10d or K20D against dust and rain water. It also has ultra smooth focusing. So after reading everything on the net and buying one here, the issue is "did you get a good one or not" I haven't had time to test mine, but I have some suspicions from some pictures I have taken that it front focuses. When Pentax gets is QC straight, this lens will be an exceptionally good deal in my opinion

Great all-around lens

27 April 2008

Pros:
- Build quality is excellent
- Weather sealed
- Very sharp from F/4 across the entire zoom range
- Great colour rendition
- SDM works as advertised: fast and quiet

Cons:
- A tad soft at 16mm F/2.8

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 圖例

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM 配件

遮光罩Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM

77 mm 濾鏡

77 mm 極化濾鏡

	Tenba RC9, 9" Waterproof Nylon Rain Cover for SLR Cameras with a 28-80mm Lens.$39.95
	1.6X Sensor Cleaning Kit w/Sensor Swab® & Rocket Blower$59.95
	Zeiss Lens Cleaner, 3 oz Spray, Ammonia Free, Safe for Multi-Coated Lenses.$3.33

	Nikon 7072 Lens Pen Cleaning System$5.99

搜尋鏡頭

Pentax smc DA* 16-50mm f/2.8 ED AL (IF) SDM

APS-C大小的影像

超聲波自動對焦

不穩定

金屬接腳

內置對焦

固定前鏡頭

天氣密封

無插入濾鏡支援